Question

. A 100m long train crosses a man walking at the speed of 5km/hr in the opposite direction in 6 seconds. What is the speed of the train

Answer 1

12.7m/sec is it correct ans please comment it

Answer 2

Let the speed of the train be x km/hr
Relative speed = x+5
Length of train = 0.1 km
Time = 6 sec = 6/(60×60) hr
$\frac{0.1}{x + 5} = \frac{6}{60 \times 60} \\ 6(x + 5) = 360 \\ x + 5 = 60 \\ x = 55 \: \frac{km}{hr}$